The digit used in the modern Western world to represent the number 2 traces its roots back to the Indic Brahmic script, where "2" was written as two horizontal lines.

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The superscript two, ², is used in mathematics to denote the square of a number or variable. It also represents the second derivative in calculus when used as a notation for differentiation.

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Mar 12, 2026 · (phonetics, often superscript) the pitch of a tone, whose value depends on local convention (e.g. nearly as high or as low as 1, if four or more numbers are used; mid pitch if the …